As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISH T/C 78472002 ON THE NR 1 ENGINE, FOUND FAN BLADES NR 5, 15, AND 20 MISSING CU-NI-IN COATING BEYOND AREA X ALL ON CONCAVE SIDE. ACFT GROUNDED. THE FAN BLADES WERE REPLACED IAW AMM 72-21-02-000-802-F00. VIBRATION SURVEY FOUND TO BE WITHIN LIMITS. OPS CHECKED GOOD.